Question: When did Luhansk Oblast stop having a short name in April 1970?
Paraphrase: When was Luhansk Oblast's name elongated in 1970?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q171965 p:P1813 ?s . ?s ps:P1813 ?obj . ?s pq:P582 ?x filter(contains(YEAR(?x),'1970')) }